<form action="" com="csv_import" enctype="multipart/form-data" externaltable="" field="" id="[com_id]" method="post" name="form1" table="">
    <p>
        CSV Datei<br />
        <label><input id="file" name="file" type="file" /> </label></p>
    <label><input id="button" name="button" type="submit" value="Upload" /> </label>
</form>